Update Docker image tags to use explicit repository owner

Author: Tresillo2017

.github/workflows/deploy.yml

@@ -27,6 +27,6 @@ jobs:
           file: ./Dockerfile
           push: true
           tags: |
-            ghcr.io/${{ github.repository_owner }}/portfolio-26-os:latest
-            ghcr.io/${{ github.repository_owner }}/portfolio-26-os:${{ github.sha }}
+            ghcr.io/tresillo2017/portfolio-26-os:latest
+            ghcr.io/tresillo2017/portfolio-26-os:${{ github.sha }}
           platforms: linux/amd64